EP3688435A1 - Drucksensor auf keramischen substrat - Google Patents
Drucksensor auf keramischen substratInfo
- Publication number
- EP3688435A1 EP3688435A1 EP18779647.9A EP18779647A EP3688435A1 EP 3688435 A1 EP3688435 A1 EP 3688435A1 EP 18779647 A EP18779647 A EP 18779647A EP 3688435 A1 EP3688435 A1 EP 3688435A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure sensor
- heating element
- pressure
- sensor according
- ceramic substrate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 239000000919 ceramic Substances 0.000 title claims description 27
- 239000000758 substrate Substances 0.000 title claims description 26
- 238000010438 heat treatment Methods 0.000 claims abstract description 61
- 239000012528 membrane Substances 0.000 claims description 14
- 238000009530 blood pressure measurement Methods 0.000 claims description 12
- 239000008186 active pharmaceutical agent Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims 1
- 239000003795 chemical substances by application Substances 0.000 claims 1
- 230000005855 radiation Effects 0.000 claims 1
- 238000005259 measurement Methods 0.000 description 9
- 230000008014 freezing Effects 0.000 description 3
- 238000007710 freezing Methods 0.000 description 3
- 101100346656 Drosophila melanogaster strat gene Proteins 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/04—Means for compensating for effects of changes of temperature, i.e. other than electric compensation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
- G01L9/0041—Transmitting or indicating the displacement of flexible diaphragms
- G01L9/0051—Transmitting or indicating the displacement of flexible diaphragms using variations in ohmic resistance
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B81—MICROSTRUCTURAL TECHNOLOGY
- B81B—MICROSTRUCTURAL DEVICES OR SYSTEMS, e.g. MICROMECHANICAL DEVICES
- B81B3/00—Devices comprising flexible or deformable elements, e.g. comprising elastic tongues or membranes
- B81B3/0018—Structures acting upon the moving or flexible element for transforming energy into mechanical movement or vice versa, i.e. actuators, sensors, generators
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/0007—Fluidic connecting means
- G01L19/0038—Fluidic connecting means being part of the housing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L23/00—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid
- G01L23/26—Details or accessories
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
- G01L9/0041—Transmitting or indicating the displacement of flexible diaphragms
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
- G01L9/02—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of variations in ohmic resistance, e.g. of potentiometers, electric circuits therefor, e.g. bridges, amplifiers or signal conditioning
- G01L9/025—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of variations in ohmic resistance, e.g. of potentiometers, electric circuits therefor, e.g. bridges, amplifiers or signal conditioning with temperature compensating means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B81—MICROSTRUCTURAL TECHNOLOGY
- B81B—MICROSTRUCTURAL DEVICES OR SYSTEMS, e.g. MICROMECHANICAL DEVICES
- B81B2201/00—Specific applications of microelectromechanical systems
- B81B2201/02—Sensors
- B81B2201/0264—Pressure sensors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
- G01L9/0041—Transmitting or indicating the displacement of flexible diaphragms
- G01L9/0051—Transmitting or indicating the displacement of flexible diaphragms using variations in ohmic resistance
- G01L2009/0066—Mounting arrangements of diaphragm transducers; Details thereof, e.g. electromagnetic shielding means
Definitions
- the invention relates to a pressure sensor for use in ge ⁇ freezing or high viscosity media.
- Internal combustion engines are e.g. necessary to carry out exact pressure measurements in different media directly after an engine cold start.
- the object is achieved by a pressure sensor according to the present claim 1.
- Dependent claims indicate advantageous embodiments.
- a pressure sensor is proposed, with which it is possible to measure a relative or absolute pressure.
- the ⁇ ser has a housing, which in turn comprises a housing wall.
- the housing wall can be sealed for a measurement of the absolute ⁇ pressure or for a measurement of a relative ⁇ pressure openings contain, for example, to use atmospheric conditions as a reference pressure.
- angeord ⁇ net a ceramic substrate and a sensor disposed thereon ⁇ relement.
- the sensor element is a component in which a pressure-induced deflection of a membrane is determined. It can be in
- the orientation of the sensor element is referred to as the upper side of the sensor element, the side of the sensor element at which the membrane is, and the opposite ⁇ opposite side as the bottom side of the sensor element.
- the sensor element can be designed as a MEMS component.
- the sensor element is mounted with its underside on the Kera ⁇ miksubstrat, which serves as a carrier and comprises an electrical connection for the sensor element.
- This serves to a measurement signal from the pressure sensor out to lei ⁇ th, where it is processed externally and where the measurement signal is assigned a pressure.
- a relative pressure below the Sensorele ⁇ ment is a fürläse in the ceramic substrate by which a MES ⁇ sendes medium is towards ge ⁇ leads to the media path of the sensor element.
- the upper side of the sensor element is exposed to a Ver ⁇ equivalent pressure, for example, is the atmospheric pressure. This can, in such a relative pressure measurement, pass through openings in the housing wall in the pressure sensor.
- the absolute pressure can be measured.
- a heating element is part of the pressure sensor .
- the heating element may be mounted at various positions in the pressure sensor for the purpose of achieving an operating temperature in the pressure sensor which allows an accurate measurement.
- By heating the pressure sensor possible solid and liquid condensates are thawed, if necessary. Evaporated and expelled or heated together with any existing highly viscous media from the pressure sensor.
- Heating element it is also possible to form a
- the heating element is designed, for example, the pressure sensor to a temperature well above the
- To freeze For example, a warming to a temperature between 20 ° C and 50 ° C, in particular up to 160 ° C provided.
- the various possible positions for the heating element are all inside the pressure sensor.
- the following are sample items in a non-exhaustive list:
- the heating element can be arranged
- the heating element is preferably mounted in the vicinity of the electrical connections.
- Ceramic substrate may also be formed as a layered ceramic.
- the heating element can, for example, a
- the heating element may also be integrated in the gel boundary.
- the different versions of the heating element can umfas ⁇ sen: a conductive plastic, eg a shaped as a meander resistor or a resistor having a positive temperature coefficient.
- Meandering of the resistor is that the resistor is longer and thus has a higher value, resulting in a higher heating cable. With the use of a resistor with positive temperature coefficients, an external control of a heating power of the heating element is no longer necessary.
- the heating element is integrated in the housing of the sensor and designed so that it can generate and radiate microwaves, with which optionally the entire pressure sensor, individual components thereof or the media to be measured are heated. This is the Ermér ⁇ tion directly at the desired location and, for example, in the medium and instead spent heating power can be used optimally.
- Such a heating element can also be arranged at a different location of the sensor.
- a power supply of the heating element can take place via different ways. There are e.g. the possibility of a power supply via the power supply of the pressure sensor, or the variant of an additional and independent from the pressure sensor power supply. The separation of the
- the pressure sensor may comprise a further heating element in one of the illustrated designs and positions. This may be attached to one of the described but different position from the position of the first heating element.
- the pressure sensor can be more homogeneous and thus
- the pressure sensor described above is for example for use in a motor vehicle, in particular for use in the exhaust gas region of a motor vehicle
- the heating element is used to heat up the
- Operating temperature is a first pressure measurement.
- the heating element is used to reduce energy consumption
- FIG. 1 shows a sectional view of a pressure sensor having disposed on a ceramic substrate sensor element for measuring absolute pressure, including various positions for ⁇ An order of a heating element.
- Figure 2 shows the sectional view of an alternative Ausu ⁇ tion of the pressure sensor on a ceramic substrate for relative ⁇ pressure measurement, with the different positions of a Schuele ⁇ management and its possible relative arrangement.
- FIG. 1 shows the schematic sectional view of a sensor element
- the sectional view shown in Figure 1 shows the structure of a rule schemati ⁇ pressure sensor DS for a ⁇ absolute pressure measurement.
- This has a housing GH comprising a housing wall GW. Inside the case is a
- Ceramic substrate KS attached and arranged thereon a sensor element SE and a gel filling GF within a Gelbegrenzung GB.
- the sensor element is in a shape on the
- Ceramic substrate arranged that pressure can act only from one side on the membrane of the sensor element. This page is the gel covered top of the
- the gel filling protects a pressure-sensitive membrane of the sensor element from moisture. Openings in the housing or the housing wall make it possible for the atmospheric pressure also to be established inside the housing and to be in contact with the gel, which puts pressure on the membrane of the housing
- Heating element are as follows: The heating element can be any heating element.
- FIG. 2 shows the schematic construction of a pressure sensor for a relative pressure measurement.
- This has a housing GH comprising a housing wall GW.
- a ceramic substrate and a KS since ⁇ up arranged sensor element SE are attached.
- the Keramiksub ⁇ strat KS has a fürläse DL.
- the sensor element is arranged on the ceramic substrate such that the passage through is under the sensor element. Through the passage, a pressurized medium can be guided to the underside of the Senso ⁇ relements.
- the atmospheric pressure passes as a reference pressure through openings in the housing to the top of the sensor element and thus enables a relative pressure measurement.
- heating elements at the positions A to D ⁇ drawn are as follows:
- the heating element can
- FIG. 3 shows an enlarged sectional view of the Sensorele ⁇ ments SE.
- a membrane of the sensor element MS to know he ⁇ here forms the top OS of the sensor element.
- Opposite the upper side is a lower side US of the sensor element, on which there is a media passage MG to the membrane of the sensor element MS.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Combustion & Propulsion (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102017122605.2A DE102017122605A1 (de) | 2017-09-28 | 2017-09-28 | Drucksensor auf keramischen Substrat |
| PCT/EP2018/076318 WO2019063717A1 (de) | 2017-09-28 | 2018-09-27 | Drucksensor auf keramischen substrat |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3688435A1 true EP3688435A1 (de) | 2020-08-05 |
Family
ID=63713878
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP18779647.9A Withdrawn EP3688435A1 (de) | 2017-09-28 | 2018-09-27 | Drucksensor auf keramischen substrat |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20200292401A1 (de) |
| EP (1) | EP3688435A1 (de) |
| JP (1) | JP2020535434A (de) |
| CN (1) | CN111108359A (de) |
| DE (1) | DE102017122605A1 (de) |
| WO (1) | WO2019063717A1 (de) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102021107576A1 (de) | 2020-03-26 | 2021-09-30 | Ifm Electronic Gmbh | Druckmessgerät mit kontrollierter Entlüftung und ein Verfahren zur Kontrolle der Entlüftung |
| DE102023206340A1 (de) | 2023-07-04 | 2025-01-09 | Infineon Technologies Ag | Sensorvorrichtung |
| DE102024200048A1 (de) * | 2024-01-04 | 2025-07-10 | Robert Bosch Gesellschaft mit beschränkter Haftung | Tanksystem und Sensoraufnahme |
Family Cites Families (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5776431A (en) * | 1980-10-30 | 1982-05-13 | Toshiba Corp | Semiconductor ressure transducer |
| JPH02124527U (de) * | 1989-03-24 | 1990-10-15 | ||
| US5625152A (en) * | 1996-01-16 | 1997-04-29 | Mks Instruments, Inc. | Heated pressure transducer assembly |
| JP4712220B2 (ja) * | 2001-05-02 | 2011-06-29 | 大亜真空株式会社 | 圧力測定装置 |
| US7347099B2 (en) * | 2004-07-16 | 2008-03-25 | Rosemount Inc. | Pressure transducer with external heater |
| DE102005029841B4 (de) * | 2004-07-28 | 2013-09-05 | Robert Bosch Gmbh | Mikromechanischer Drucksensor mit beheiztem Passivierungsmittel und Verfahren zu seiner Steuerung |
| US7201057B2 (en) * | 2004-09-30 | 2007-04-10 | Mks Instruments, Inc. | High-temperature reduced size manometer |
| US7124640B1 (en) * | 2005-07-13 | 2006-10-24 | Mks Instruments, Inc. | Thermal mounting plate for heated pressure transducer |
| JP4563312B2 (ja) * | 2005-12-05 | 2010-10-13 | 株式会社堀場エステック | 静電容量式圧力センサ装置 |
| WO2008154760A1 (de) * | 2007-06-19 | 2008-12-24 | Inficon Gmbh | Vakuummesszellenanordnung mit heizung |
| JP2009058366A (ja) * | 2007-08-31 | 2009-03-19 | Nissan Motor Co Ltd | 圧力検出装置 |
| DE102008002579A1 (de) * | 2008-06-23 | 2009-12-24 | Robert Bosch Gmbh | Mikro-elektromechanisches Sensorelement |
| DE102008049143B4 (de) * | 2008-09-26 | 2012-08-16 | Intelligente Sensorsysteme Dresden Gmbh | Drucksensor und Herstellungsverfahren |
| US8186226B2 (en) * | 2009-12-09 | 2012-05-29 | Honeywell International Inc. | Pressure sensor with on-board compensation |
| JP2012189349A (ja) * | 2011-03-09 | 2012-10-04 | Seiko Epson Corp | 流速センサー |
| CH704815A1 (de) * | 2011-03-30 | 2012-10-15 | Inficon Gmbh | Gasdruckmesszellenanordnung. |
| DE102012223879A1 (de) * | 2012-12-20 | 2014-07-10 | Robert Bosch Gmbh | Verfahren und Vorrichtung zum Betreiben eines Drucksensors einer Abgasnachbehandlungseinrichtung eines Kraftfahrzeugs |
| DE102014207480A1 (de) * | 2014-04-17 | 2015-10-22 | Robert Bosch Gmbh | Vorrichtung zum Erfassen eines Parameters eines Gases, Verfahren zum Betreiben einer derartigen Vorrichtung und Messsystem zum Bestimmen eines Parameters eines Gases |
| JP6461741B2 (ja) * | 2015-07-30 | 2019-01-30 | アルプス電気株式会社 | センサパッケージ |
-
2017
- 2017-09-28 DE DE102017122605.2A patent/DE102017122605A1/de not_active Withdrawn
-
2018
- 2018-09-27 CN CN201880063088.8A patent/CN111108359A/zh active Pending
- 2018-09-27 JP JP2020518018A patent/JP2020535434A/ja active Pending
- 2018-09-27 WO PCT/EP2018/076318 patent/WO2019063717A1/de not_active Ceased
- 2018-09-27 US US16/650,937 patent/US20200292401A1/en not_active Abandoned
- 2018-09-27 EP EP18779647.9A patent/EP3688435A1/de not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| DE102017122605A1 (de) | 2019-03-28 |
| WO2019063717A1 (de) | 2019-04-04 |
| US20200292401A1 (en) | 2020-09-17 |
| CN111108359A (zh) | 2020-05-05 |
| JP2020535434A (ja) | 2020-12-03 |
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Legal Events
| Date | Code | Title | Description |
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| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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| STAA | Information on the status of an ep patent application or granted ep patent |
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| 17P | Request for examination filed |
Effective date: 20200319 |
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| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
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| AX | Request for extension of the european patent |
Extension state: BA ME |
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| RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: POLDER, BERND Inventor name: WOHLGEMUTH, CHRISTIAN Inventor name: IHLE, JAN Inventor name: BOHL, BENJAMIN Inventor name: HUNDERTMARK, BERT |
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| DAV | Request for validation of the european patent (deleted) | ||
| DAX | Request for extension of the european patent (deleted) | ||
| 18D | Application deemed to be withdrawn |
Effective date: 20201118 |